Patent GB-539453-A (GB)
Abstract: 539,453. Calculating-machines. BURROUGHS ADDING MACHINE CO. Jan. 9, 1940, No. 466. Convention date, Oct. 16, 1939. [Class 106 (i)] Key-set independently operated machines are provided with means operating automatically during a cycle to move the paper carriage through a plurality of printing positions, and also with means acting automatically during a cycle of operations o: the machine to operate the printing mechanism a plurality of times in each of the printing positions. In the example described, the machine is adapted to print a public utility bill as in Fig. 1, where the bill comprises a customer's portion and three tear-ofl stubs on which the information is repeated, there being four printing operations of the same printing mechanism during the last part of the machine cycle and during movement of a carriage from column position to column position. Printing mechanism.-The type 16 is carried by the rear ends 17 of the differential actuators 15 which are released and restored by a bail. Near the end of the first half-cycle, a hammer mechanism drives the type 16 against a platen 19 on a travelling paper carriage 22 urged to the lefttabulating direction-by a spring in a drum. A " carriage normal " key 24 disables " the tabulating mechanism when necessary and " enables " the linespacing mechanism at the same time. The carriage is returned by a power mechanism 25 set in operation automatically or by a " carriage return " key. Totalizing mechanism.- Add and subtract pinions 26, 27 intermesh and are engaged with the differential actuators before their return. " Total " and " sub-total " mechanism acts as usual and registers 35 may be operated selectively. Tabulating mechanism.-The carriage supports a rockable tab bar 40, Fig. 5, having tab stops 41. During the latter half of the cycle, the tab bar is momentarily rocked to raise the stop 41 above a stationary abutment 42, Fig. 8, whereupon the carriage passes under the influence of the spring 23, Fig. 4 (not shown), until arrested at the next tab stop, the bar being released in time to present this stop. The bar is rocked from the shaft 3 through crank 44, lever 45 and pin and fork connection 47 with a lug 48 on a slide 50, Fig. 8. This slide has a spring pawl 52. During first half-cycle, the slide 50 moves down with pawl 52 until the pawl moves under the active stop 41, so that, when slide 50 moves up in the latter half-cycle, the pawl engages the tab stop and rocks the bar 40, and the stop 41 above stop 42. A slide 60 normally not connected to slide 50 straddles the line-spacing bail 63 by projections 61, 62. These slides may be connected by a spring pawl 64 on slide 50 engaging a notch 68 on slide 60. Carriage-return mechanism.-The motor 1 drives through mechanism in a housing 25 a gear 70, Fig. 6, to which a gear 71 meshing with a rack 71a on the carriage may be clutched at 72. The clutch is controlled by a lever 73. During the latter half of the cycle, the carriage is released by the tabulating mechanism and moves to the right, Fig. 5. A stop 82 on the carriage engages the end of a slide 80 and then through suitable linkage rocks the lever 73 to engage clutch 72. Near the stop position, a member 100 on the carriage disengages the clutch. A manual control for the clutch is provided from a special key through levers and a link 128. The motor switch is operated with the lever 73. In the present invention, the carriage stop 82 engages the end of a secondary slide 120 mounted for limited movement in the slide 80 and urged to the right, Fig. 6, by a spring 122. Near the end of the cycle, the stud 136 on crank 137 on shaft 138 engages the nose 135 of lever 132 and rocks it. This moves the stud 131, Fig. 7, and acting on pawl 130 moves the link 128. In column position 5, the stop 82 engages slide 120 and moves it to rock the bell crank 123 and to position lug 123a in front of bell crank 126. When the motor is energized, the shaft 138 rotates. The parts are timed so that after printing has taken place, the lever 132 is rocked, link 128 pulled down and through 126, 123 the slide 80 is moved to the left, Fig. 6, and the lever 73 operated to engage the clutch. Control of carriage movement by regular motor bar.-Theentriesin column 1, Fig. 1, top line are made and the bar depressed. During the latter part of the cycle, the carriage moves to column 5 and stops. The necessary entries are made in column 5 and the bar is depressed to start a cycle, printing occurring in column 5 and multiple prints in columns 4, 3 and 2. In column 5, after printing, the link 128 is moved down and return mechanism started, slide 120 having been set by stop 82. When column 1 is reached, the cam 103 disengages the clutch and restores parts to normal. The stud 140 on bail 141 hits latch 142 and releases the ejecting means 37, 38. Control of carriage movement by auxiliary motor bar.-This is for bills with two lines like the top line of Fig. 1, say for electricity and gas. After making entries in column 5 the bar 150 is depressed. This carries down the main motor bar 5 with it. The stem 151 of bar 150 controls the ejecting, the sheet not being ejected in column 1 and the platen is line-spaced in this position during completion of the cycle through slide 60 being connected to slide 50. The second line of entries is made, but in column 5, the regular motor bar 5 is depressed and on return the sheet is ejected. Control of carriage by " special motor bar."- When this bar 170 is depressed, the arm 195, Fig. 7, is rocked downward, its long stud 196 rocking pawl 130 counter-clockwise to a disabled position releasing pawl 200 to move its shoulder under stud 131 on lever 132. The link 128 will not be moved down and carriage return is disabled. It is set into operation by link 201 with the aid of the pawls on the left, Fig. 6, which rock lever 73 and the carriage returns from No. 5 to No. 1 position. As the carriage moves slightly out of No. 2 position towards No. 1 position, a carriage roll 220 engages stud 221 on lever 222 and rocks it counter-clockwise, Fig. 6, whereupon the part 216 is pulled down and lever 73 rocked to disable carriage return and free the carriage to return to No. 5 position. Multiple printing.-The type 16, Fig. 11, is urged to retracted position by springs 230. Pivoted on a stationary shaft 323, Fig. 12, is hammer 232 controlled by a firing member 234 carrying a stud 235 working in a cam slot 236 in the hammer. The firing member is loose on shaft 237 and urged clockwise by a spring 238 normally held by a latch 240. When the latch is released, under the spring 238, the hammer is driven towards the type an enlargement in the end of the slot allowing final impact by momentum. The spring retracts type and hammer clear of paper to prevent blurring. The latch is released by a pawl 245 pivoted on shaft 246 carried on arms 247 on shaft 248. Normally, the nose of pawl 245 is slightly forward of the shoulder on the pawl. A cam nose 252, Fig. 10, is positioned to engage the cam edge 253 of arm 17. The shaft 246 is rocked by arm 255, Fig. 11, fixed to shaft 248 and in path of stud 256 on member 257 fixed to the shaft 800. In first half of the cycle, the shaft 800 is rocked clockwise, Fig. 10, and then counter-clockwise. Near the end of the first half-cycle the stud 256 engages arm 255 and moves all pawls 245 forward. The noses 252 of pawls in orders in which the levers 17 have not been moved above zero position engage cam 253 and pawls are released and fail to trip the latches. When the levers 17 have moved above zero, the cams are raised and the noses of the pawls engage the latches to release them and the firing members 234. The printing mechanism is restored by bail 260 moved by shaft 800. Ciphers to the right are printed by having the latches 240 provided with overlapping tails 264. According to the present invention, the machine is provided with a toggle lock for the general operating mechanism. Fixed to the main shaft 3 is arm 270, Figs. 10 and 11, to which is pivoted one link 271 of a toggle whose second link 272 is pivoted to this and to a shaft 273. At the end of half a cycle, the toggle is moved to the position of Fig. 11, where it will prevent the return movement of arm 170 and shaft 3 unless the toggle is broken. When the shaft 246 is moved forward near the end of the half cycle, the spring pawl 275 is engaged and rocked to release the member 280 very shortly after the firing members 234 are released. The member 280 has a shoulder 283 positioned to strike a projection on the end of link 272 and break the toggle 271, 272. Thus the toggle blocks the main operation of the machine while printing occurs. The release of the toggle is prevented by blocking lever 290 pivoted on shaft 323 and having an abutment end adapted to engage the stud 291 on part 280. The blocking lever 290 is controlled by a slide 293 governed by the carriage, the slide having a slot 294 that may register with a stud 295 on lever 290. The slide 293 is part of the mechanism that controls automatic repeat cycles governed by the repeat slide 10. The slide 293 is connected to stud 297 Fig. 8, on arm 299 of bail 300. The other arm of the bail is in the path of carriage roll 302. When a machine cycle is initiated in column 5, the toggle is blocked at the end of a half cycle of shaft 3 and crank 270. As carriage moves out of column 2 position to column 1 position, the roll 302 moves slide 293 so that notch 294 is out of register with stud 295 and thereby carries the lever 290 out of active position, whereby member 280 is released to release toggle. Another release roll 303 is provided in column 1 to prevent the toggle being locked during a cycle initiated in that column. The small roll 302 moves the repeat slide a shorter distance than the large roll controlling repeat machine cycles. The motor shaft 138, Fig. 10, carries a four-pointed cam 310 on the driving side of the clutch. Positioned for en